基于改进DDS技术的FPGA数字调制器研究与实现

提出了一种基于改进直接数字频率合成(DDS) 技术的现场可编程门阵列(FPGA)数字调制器设计与实现方法.该方法首先对DDS技术进行改进,然后再利用这种改进的DDS技术在Matlab/ DSP Builder环境下建立现场可编程门阵列(FPGA)数字调制器的设计模型.通过对二元频移键控(BFSK) 的仿真实验表明,使用这种改进DDS技术的FPGA数字调制器实现方法建立的模型进行算法级和寄存器传输级(RTL)仿真,不仅能验证模型的正确性和有效性,且还简化系统的硬件电路,节省系统资源,提高系统的可靠性与灵活性,最终达到成本低,修改方便,快速产生多种模式数字调制信号的目的.

Research and Implement of FPGA Digital Modulator Based on Improved DDS Technology

In this paper a method of designing and implementing Field Programmable Gate Array (FPGA) digital modulator based on the improved Direct Digital Synthesizer (DDS) technology is presented.First the DDS is improved,and then the design model of FPGA digital modulator is built by improved DDS technology through running the Matlab/DSP Builder environment.Experiment on Binary Frequency-Shift-Keying (BFSK) by DDS technology shows that,using this new method to establish the model of the algorithm and Register Transport Level (RTL) based simulations can not only verify the correctness and validity of the models,but can also simplify the hardware circuit of the modem system greatly,save plenty of the system resources and improve the reliability and flexibility.And the purpose of low cost,reconfiguring the circuit conveniently and producing many kinds of the digital signal modulation are achieved eventually.